Insulating material



Sept. 8, 1931. F. W INKI ELMANN Q 1,322,636

INSULATING MATERIAL Filed March 5, 1930 Patented Sept. 8, 1931 HENRY F.WINKELMANN, NEBRASKA CITY, NEBRASKA INSULATING MATERIAL Applicationfiled March 5,

cold insulator and a sound deadener and it is more especially animprovement uponthe preparation covered by Patent 1,743,744 issued to meon January 14, 1930; It is particularly useful as a roof covering, awall insulator and as a sound proofing material forfloors.

One of the objects is to provide a material which is extremely light,can be made at a low cost, and can bemolded into slabs of desiredproportions ready to be placed in position for use.

-With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in certain novel featureshereinafter more fully described and pointed out in, the claims it beingunderstood that changes may be made Without departing from the spirit ofthe invention as claimed.

- covering of the same material.

In the accompanying drawing a portion of a slab embodying the presentimprovements has" been shown.

The composition used in making the insulating material consists of thefollowing ingredients substantially in the proportions stated, namely,

- Per cent by volume Asphalt 30 Parafline oil 5 Flaxfibre 15 To theforegoing ingredients there is added of phlogopite which has been heatedto approximately 2500 F. Phlogopite thus treated is extremely light andisformed of formed layer has cooled and reached its max- After' the1930. Serial No. 433,396.

imum degree of hardness, it can be cut into slabs ready for use. Ifpreferred the material when used for roofing purposes, etc., can bemoulded in a single slab at the place where it is to be left.

In the drawing which illustrates a portion of a slab having the presentimprovements, the phlogopite has been shown at 1, the balance of themixture at 2, and the layers of paper at 3.

The advantage resulting from the use of phlogopite is that the.composition is rendered fire-proof sound-proof, and moistureproof. Thisresults in the formation of small air spaces in the material.

The asphalt when mixed with the parafiin oil produces a rubber-likepasty substance which can be formed easily into a slab. The

flax fiber constitutes an eflicient reinforcement while the paper servesto hold a slab in proper shape during the process of manufacture of aslab.

While this composition has been described an adhering mixture includingthe following ingredients substantially in the proportions stated,namely, asphalt 30%, parafiine oil 7 5%, flax fibre 15%, and flakedphlogopite 50 0.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature.

HENRY F. WINKELMANN.

